<template>
  <div :style="styleExternalIcon" class="svg-external-icon svg-icon" v-if="isExternal" v-on="$listeners" />
  <svg :class="svgClass" aria-hidden="true" v-else v-on="$listeners">
    <use :href="iconName" />
  </svg>
</template>

<script>
// doc: https://panjiachen.github.io/vue-element-admin-site/feature/component/svg-icon.html#usage
import { isExternal } from '@/utils/validate';

export default {
    name: 'SvgIcon',
    props: {
        iconClass: {
            type: String,
            required: true,
        },
        className: {
            type: String,
            default: '',
        },
    },
    computed: {
        isExternal() {
            return isExternal(this.iconClass);
        },
        iconName() {
            return `#icon-${this.iconClass}`;
        },
        svgClass() {
            if (this.className) {
                return `svg-icon ${this.className}`;
            }
            return 'svg-icon';
        },
        styleExternalIcon() {
            return {
                mask: `url(${this.iconClass}) no-repeat 50% 50%`,
                '-webkit-mask': `url(${this.iconClass}) no-repeat 50% 50%`,
            };
        },
    },
};
</script>

<style scoped>
.svg-icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.15em;
  fill: currentColor;
  overflow: hidden;
}

.svg-external-icon {
  background-color: currentColor;
  mask-size: cover !important;
  display: inline-block;
}
</style>
